--- title: "NAD+: what sources report" url: https://humanpeptides.fyi/peptides/nad-plus site: humanpeptides.fyi last_reviewed: 2026-10-11 --- # NAD+ > humanpeptides.fyi makes no claims of its own. Every statement below reports what a cited source says, with its link. Not medical advice. NAD+: Nicotinamide adenine dinucleotide, an essential coenzyme for cellular energy metabolism and substrate for sirtuins/PARPs/CD38. The sources cited here most often discuss it for: Raises NAD+ levels; Mitochondria and sirtuins, lab data; Energy and focus, anecdotal. Evidence label: Early human. ## At a glance - **Type:** Not a peptide - **Family:** Longevity & Mitochondria - **Evidence label:** Early human (3 of 5) - **Regulatory status:** In October 2024 FDA reminded compounders that food-grade NAD+ is not suitable for making sterile intravenous products without appropriate processing, and noted adverse event reports after NAD+ injections, including severe chills, shaking, vomiting and fatigue, consistent with excessive endotoxin levels. - **Goals discussed:** Longevity & Cellular Aging, Energy & Endurance, Focus & Cognition, Calm & Mood - **Also called:** nicotinamide adenine dinucleotide, Beta-Nicotinamide Adenine Dinucleotide, NAD, NAD+ IV - **Last reviewed:** 2026-10-11 ## What is NAD+? - Nicotinamide adenine dinucleotide, an essential coenzyme for cellular energy metabolism and substrate for sirtuins/PARPs/CD38; levels decline with age; sold as IV/subcutaneous injections (not FDA-approved as a drug for any indication) or raised via oral precursors NMN/NR. Sources: NAD+ is a coenzyme built from two nucleotides, not a peptide; it is listed here because clinics and peptide sellers commonly offer it alongside peptide therapies. **Regulatory status:** In October 2024 FDA reminded compounders that food-grade NAD+ is not suitable for making sterile intravenous products without appropriate processing, and noted adverse event reports after NAD+ injections, including severe chills, shaking, vomiting and fatigue, consistent with excessive endotoxin levels. Source: ## What is NAD+ researched for? ### 1. Raises NAD+ levels - Raises NAD+ levels (theoretically restoring age-related NAD+ decline); IV infusion raised plasma NAD+ ~400% at end of 6 h infusion in a small human pilot; oral NR/NMN about double blood NAD+ (human trials) Sources: , , - Goals: [Longevity & Cellular Aging](https://humanpeptides.fyi/objectives/longevity) ### 2. Mitochondria and sirtuins, lab data - Supports mitochondrial function and sirtuin activity (SIRT1/SIRT3 mitochondrial biogenesis, mitophagy) per mechanistic reviews (cell/animal data) Sources: , - Goals: [Energy & Endurance](https://humanpeptides.fyi/objectives/energy), [Longevity & Cellular Aging](https://humanpeptides.fyi/objectives/longevity) ### 3. Energy and focus, anecdotal - Users report energy, focus and mood boosts after injections, highly variable/possibly placebo (anecdotal Reddit) Sources: , - Goals: [Energy & Endurance](https://humanpeptides.fyi/objectives/energy), [Focus & Cognition](https://humanpeptides.fyi/objectives/mind), [Calm & Mood](https://humanpeptides.fyi/objectives/mood) ## What do researchers and users say about NAD+? > "Age-associated decline in NAD+ levels has generated interest in NAD+-augmenting strategies; however, recent large-scale human data indicate that whole-blood NAD+ concentrations do not decline with healthy aging per se." > > Alangari A, Arif J, Al Qureshah F, Alkhodairy F, Narrative review of intravenous NAD+ and NAD+ precursors in wellness and translational medicine (Frontiers in Aging, 2026). Context: Abstract of a 2026 narrative review; the authors conclude evidence is insufficient to support routine clinical or wellness IV NAD+ use. > "FDA has received adverse event reports following use of NAD+ injectable drugs, including severe chills, shaking, vomiting and fatigue with some requiring medical treatment." > > US Food and Drug Administration, FDA reminds compounders to use ingredients suitable for sterile compounding (October 2024). Context: FDA notice about compounded IV NAD+ made from food-grade ingredients; FDA said the reactions were consistent with endotoxin contamination. > "My eyes feel more wide open and brain feels like it's working." > > Anonymous user, r/NicotinamideRiboside, NAD+ Subcutaneous injections. Context: Single forum self-report shortly after starting; uncontrolled and possibly placebo. ## What side effects of NAD+ are reported? - IV NAD+ caused transient cramping, nausea/vomiting, diarrhea, tachycardia, chest/throat pressure during infusion (retrospective pilot) Sources: - Subcutaneous injections: intense flushing, lightheadedness, nausea, headaches, injection-site discomfort (anecdotal Reddit) Sources: , - Severe chills, shaking, vomiting and fatigue, sometimes needing medical treatment, consistent with endotoxin contamination of IV products compounded from food-grade NAD+. (FDA adverse event reports) Sources: - HDL (good) cholesterol fell significantly over 30 days in people receiving NAD+ IV in a small retrospective study. (retrospective human pilot) Sources: - High extracellular NAD+ may act as a danger signal to the immune system and have proinflammatory effects. (theoretical, cited in study background) Sources: - No long-term safety data exist for IV NAD+. (narrative review) Sources: ## What do peptide guides say about NAD+? - **Seek Peptides:** Seek Peptides stresses that NAD is not a peptide but a coenzyme made of nucleotides, and that the label NAD peptides really refers to peptides said to support NAD+-dependent pathways. - **Frontiers in Aging:** A 2026 review finds human evidence for IV NAD+ is sparse, mostly small uncontrolled studies and case reports, and judges it insufficient to support routine clinical or wellness use. - **Frontiers in Aging:** In a 2026 real-world comparison, NAD+ IV caused moderate to severe gut symptoms, faster heart rate and chest pressure that stretched infusions to about 97 minutes versus 37 for nicotinamide riboside IV. - **Frontiers in Aging Neuroscience:** A 2019 pilot found infused NAD+ was rapidly and completely cleared from plasma for at least the first two hours, with no measurable rise in blood NAD+ or its metabolites during that time. ## What does the research say, system by system? ### Body & tissues - NMN 250 mg/day increased muscle insulin signaling and remodeling gene expression in prediabetic women (human RCT, precursor not NAD+ itself) Sources: - NR improved 6-minute walk in peripheral artery disease (human trial, in meta-analysis) Sources: ### Hormones & physiology - NMN increased insulin-stimulated muscle glucose disposal ~25% (human RCT, n=25) Sources: - Meta-analyses: no consistent effect of NMN on glucose, HbA1c, lipids; small diastolic BP reduction Sources: , ### Cells & mitochondria - Age-related NAD+ decline driven by reduced salvage and higher consumption by PARP1/CD38, lowering SIRT1/SIRT3 activity and mitochondrial function (review) Sources: , ### Brain, mood & sleep - Some users report mental clarity/focus after injections (anecdotal) Sources: ### Weight & metabolism - NMN meta-analyses show no consistent effect on body weight, glucose, insulin resistance or lipids (human RCT meta-analysis) Sources: ### Muscle - Meta-analysis: NMN/NR show no consistent improvement in skeletal muscle mass or function Sources: ### Also notable - No established anti-aging/longevity efficacy in humans despite mechanistic rationale Sources: ## How strong is the evidence for NAD+? **Early human** (3 of 5). Strong mechanistic/animal rationale; small human trials show it raises NAD+ but inconsistent clinical benefits; injectable NAD+ mostly anecdotal _Small, short, old, unblinded or single-group human studies._ ## Questions about NAD+ ### What is NAD+? Nicotinamide adenine dinucleotide, an essential coenzyme for cellular energy metabolism and substrate for sirtuins/PARPs/CD38. NAD+ is a coenzyme built from two nucleotides, not a peptide; it is listed here because clinics and peptide sellers commonly offer it alongside peptide therapies. ### Is NAD+ FDA-approved? In October 2024 FDA reminded compounders that food-grade NAD+ is not suitable for making sterile intravenous products without appropriate processing, and noted adverse event reports after NAD+ injections, including severe chills, shaking, vomiting and fatigue, consistent with excessive endotoxin levels. ### What is NAD+ researched for? The sources cited on this page most often discuss three outcomes: Raises NAD+ levels; Mitochondria and sirtuins, lab data; Energy and focus, anecdotal. Each line above shows what the source reports and how strong that evidence is. ### What side effects of NAD+ are reported? Reported in the cited sources: IV NAD+ caused transient cramping, nausea/vomiting, diarrhea, tachycardia, chest/throat pressure during infusion; Subcutaneous injections: intense flushing, lightheadedness, nausea, headaches, injection-site discomfort; Severe chills, shaking, vomiting and fatigue, sometimes needing medical treatment, consistent with endotoxin contamination of IV products compounded from food-grade NAD+. The list is not complete, and few listed risks does not mean a compound is safe. ### How strong is the evidence for NAD+? Evidence label: Early human. Strong mechanistic/animal rationale; small human trials show it raises NAD+ but inconsistent clinical benefits; injectable NAD+ mostly anecdotal. ### What else is NAD+ called? Names used for it include nicotinamide adenine dinucleotide, Beta-Nicotinamide Adenine Dinucleotide, NAD, NAD+ IV. ### Does humanpeptides.fyi recommend NAD+? No. humanpeptides.fyi makes no claims and no recommendations of its own. It summarizes and links to what others have published and posted. Nothing here is medical advice; talk to a licensed clinician. --- Family: [Longevity & Mitochondria](https://humanpeptides.fyi/peptides?cat=longevity). HTML version: . Disclaimer: